EvilBoris has posted a video online showing the Raspberry Pi working as an ambilight server to give environmental lighting effects behind a television. You can see the video below:

You can get the kit he used from Lightberry – he used the HDMI kit. They’re currently out of stock but I believe you can back order the kit – it’s quite reasonably priced considering what you get.

EvilBoris has also posted a couple of video tutorials to help you get set-up: here and here so take a look before you buy.

Here’s another video, this time of the trailer to Guardians of the Galaxy. Just because: